When the 100 bright silver version of Xiaomi 6 is still in crowdfunding, the magic mirror version of Huawei nova 2 Plus has been sold. Different from the glass material of Xiaomi 6, the bright color and bright black color of Huawei nova 2 Plus are polished on the basis of metal material. This new grinding technology was completed by Huawei Institute of Japan in the past two years. At the same time, the magic mirror version of Huawei's nova 2 Plus has been in operation for 8 months. Recently, Huawei unveiled the secret behind the Huawei nova 2 Plus magic mirror version at the Beijing Research Institute, and selected the most satisfactory one from the 100,000 pieces of raw materials, just the small experience experienced by Huawei in the development of the magic mirror version. One of the episodes.
The embarrassment of the "thousands of one side" on the back of the mobile phone has been intensified a long time ago. Unlike the traditional change in color, Huawei nova 2 Plus wants more challenges than ever before. The product manager of Huawei's mobile phone found the technicians of Huawei's Japan Research Institute. At this time, Huawei's Japan Research Institute has started research and development of bimetal composite materials for nearly two years. The R&D personnel of the two places hit it off and officially launched to Huawei nova 2 8 months ago. Plus's plan for "mirror makeup".
Finally, Huawei's nova 2 Plus bright black and bright silver two colors, named "mirror version", used to describe the product's shiny mirror back shell is appropriate.
Inspired by Huawei's product manager, it is not from the fairy tale town, but a real sculpture in the Millennium Park in Chicago - Cloud Gate. Cloud Gate is a very famous sculpture and a tourist attraction in Chicago. There is its appearance in "Source Code".
Cloud Gate, the picture comes from the network
The biggest highlight of Cloud Gate is its stunning mirror. It is made up of 168 pieces of stainless steel and a magical liquid sculpture. The surface is very smooth. Visitors can see the reflected and distorted outlines of the city, but they never observe it. To the seams.
Since Cloud Gate is not a fairy tale, can Huawei nova 2 Plus create a realistic version of the mirror? Inspiring at the same time, Huawei hopes to launch a high-tech mobile phone to meet the young people's new fashion and lead the trend in the name of light and shadow.
Two years to achieve the magic mirror version of the breakthroughSince it is necessary to take into account the lightness and thinness of the mobile phone, it is obviously unrealistic to use the stainless steel with high density of the mirror metal. The combination of the aluminum alloy material and the stainless steel material is a solution that meets the user experience.
However, if you want to combine aluminum alloy and stainless steel, there is no mature technology on the market. Traditional bonding methods such as cold press composite, hot press composite, and explosive composite can cause mechanical stress residual or thermal stress residual, which cannot meet Huawei's process requirements.
Finally, Huawei Japan Institute chose to break through the traditional surface active composite process, and the two materials are closely combined by adsorption. In this way, the composite with the least stress can be developed, and the composite material hardly changes before and after.
It is only the first step to attach the stainless steel material to the aluminum alloy. In order to obtain the mirror effect of the "mirror mirror", the back cover of the mobile phone needs to be ultra-precision polished. In the mirror polishing process, Huawei uses the CMP (Chemical Mechanical Polishing) process to virtually eliminate the unevenness of the surface of the material and increase the gloss of the surface of the stainless steel material by nearly 100 times (18.6=â€1342). Ra0.01, to achieve super-mirror effect. This is a far cry from the traditional grinding or CNC process.
CMP (Chemical Mechanical Polishing) process
Each phone has undergone 1800 seconds of CMP polishing, and before that, there was an antenna nano-injection process. However, nano-injection has also encountered challenges. Huawei's nova 2 Plus mirror version uses composite materials, which makes traditional nano-injection intimately close to the material. For this reason, Huawei has applied a 60-nanometer T-process micropore on the surface. Ensure that the antenna strip fits snugly against the mirror's back shell.
(Huawei engineers show examples of process samples from 11 processes in the R&D process)
In fact, the back of the Huawei nova 2 Plus has undergone two special CMP polishing. The technical difficulty lies in the combination of chemical and mechanical technologies. While the chemical is constantly corroding the metal surface, it is necessary to accurately grasp the time and synchronize it with the mechanical polishing process. This kind of synergy is demanding for the process, and after thousands of debugging and exploration, the final glossy effect is achieved.
In addition, a vacuum coating is applied to the surface of the mirror-finished stainless steel by means of ion evaporation in a vacuum environment to form a hard protective layer with better hardness and scratch resistance. On this basis, Huawei also carried out anti-scratch test, using a thinner steel ball, plus 1 kg of load, on the surface of the product to record whether there are obvious scratches. From the test results, the anti-scratch performance of the mirror version is better than the ordinary vacuum coating.
100,000 pieces take one of the technologies and the amount of gold is amazing.After the actual measurement by Huawei Lab, the pencil hardness test of Huawei's nova 2 Plus's mirror back cover can exceed the glass. The gold content of the entire technology is second to none in the industry.
Behind the seemingly simple craftsmanship, every step is a very difficult challenge. Huawei told us that in the process of developing the magic mirror version, after 100,000 pieces of R&D raw materials were verified, one of the 100,000 pieces was taken, and it was difficult to climb the sky from the quantitative level. However, Huawei did not intend to use the crowdfunding of 100 units each time like Xiaomi.
The Huawei nova 2 Plus is available in two versions: bright silver and bright black. However, because the color of the bonding process itself is derived from the properties of the metal atom itself, rather than post-coloring, there are currently only two colors. On the desk of Huawei Product Manager, the reporter saw that there is a bright blue version, but the bright blue version is still exploring the processing of the edge color, so it does not appear in the mass production model. We expect Huawei to bring us more possibilities in the process. I believe that the nova 2 Plus mirror version is just the beginning.
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